Which functions c(x) represents the monthly cost in dollars in terms of x, the number of gigabytes used in a month

The answer in the procedure

Step-by-step explanation:

Let

x ----> the number of gigabytes used in a month

C(x)------> the monthly cost in dollars

step 1

For the interval ----> [0,2]

step 2

For the interval ---->(2,6]

Find the equation of the line

Find the slope

we have

The equation of the line in to point slope form is equal to

therefore

step 3

For the interval ----> (6,∞]